<button mat-icon-button [class]="{pulse: isBeating}" color="accent" (click)="isBeating = !isBeating">
  <mat-icon>favorite</mat-icon>
</button>
<app-size></app-size>
<app-invisible></app-invisible>
<app-text-resize></app-text-resize>
<p appHighlight>Animated directive</p>
